this post was submitted on 23 Apr 2025
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You can do FP in any programming languages, some are just focusing more on it than others. With OCaml, you will have what might be the best type system of the world. With Haskell, purity everywhere. With clojure, Lisp which is awesome. So Ruby should just fit, here are some resources to make you understand what is FP :
Another interesting resource is how John Carmack talk about potential use of purity (with haskell in its case) in event passing to entities in video game at the Quake Con 2013 (~17min 30). It made me better understand how pure and impure code should coexist.